/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineSessionInterface.h
Begins cloud based matchmaking for a session
true if successful searching for sessions, false otherwise
bool StartMatchmaking ( const [TArray](API\Runtime\Core\Containers\TArray)< FUniqueNetIdRef > & LocalPlayers, [FName](API\Runtime\Core\UObject\FName) SessionName, const [FOnlineSessionSettings](API\Plugins\OnlineSubsystem\FOnlineSessionSettings) & NewSessionSettings, [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FOnlineSessionSearch](API\Plugins\OnlineSubsystem\FOnlineSessionSearch) > & SearchSettings )